Secret tunnels and passages have been used for centuries for various purposes, including espionage, smuggling, and clandestine activities. This article highlights the top 15 secret tunnels and passages around the world that have captured the imagination of people.

Some of these secret tunnels include the Cu Chi Tunnels in Vietnam, used by the Viet Cong during the Vietnam War, and the Zion-Mount Carmel Tunnel in Utah, which was built to create easier access to Zion National Park. The article also mentions the Derinkuyu underground city in Turkey, with its intricate network of passageways and rooms.

Other notable secret tunnels and passages featured in the article are the Hidden Passageway at Clifton's Living Museum of Animals in Bristol, England, and the Vardzia Cave Monastery in Georgia. These hidden tunnels and passages not only serve as a reminder of the ingenuity of people throughout history but also provide a glimpse into the mysterious and secretive world that lies beneath the surface.